The British National Health Services explains that individuals have different caloric needs based on age, weight, height, lifestyles, hormones and medications. A person interested in learning exact caloric needs should consult a medical practitioner and conduct his own research. A journal helps track food and calories consumed during the day.
According to the British NHS, the average man needs 2500 calories of a balanced diet each day to maintain his weight, while the average woman requires only 2000 calories per day. The British NHS recommends that its estimates be used only as a rule of thumb rather than professional medical advice.